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<p>&#x56DE;&#x987E;<code>3.2 &#x753B;&#x4E2A;&#x6B63;&#x65B9;&#x5F62;</code> &#x8FD9;&#x4E00;&#x7AE0;&#x7684;&#x5B9E;&#x4F8B;&#xFF0C;&#x7ED8;&#x5236;&#x4E00;&#x4E2A;&#x6B63;&#x65B9;&#x5F62;&#xFF0C;&#x9700;&#x8981;&#x4E0A;&#x4F20;6&#x4E2A;&#x9876;&#x70B9;&#x6570;&#x636E;&#x5230;GPU&#x3002;
&#x4F46;&#x662F;&#x6211;&#x4EEC;&#x90FD;&#x77E5;&#x9053;&#xFF0C;&#x5B9E;&#x9645;&#x4E0A;&#x53EA;&#x6709;4&#x4E2A;&#x9876;&#x70B9;&#x6570;&#x636E;&#x3002;&#x53EA;&#x662F;&#x4E3A;&#x4E86;&#x51D1;&#x6210;2&#x4E2A;&#x4E09;&#x89D2;&#x5F62;&#xFF0C;&#x5C06;&#x8FD9;4&#x4E2A;&#x9876;&#x70B9;&#x5206;&#x4E3A;&#x4E86; 3 3 &#x4E24;&#x4EFD;&#x3002;</p>
<p>&#x91CD;&#x590D;&#x7684;&#x9876;&#x70B9;&#x4E0D;&#x4EC5;&#x589E;&#x52A0;&#x4E86;&#x4E0A;&#x4F20;&#x5230;GPU&#x7684;&#x6570;&#x636E;&#x91CF;&#xFF0C;&#x4E5F;&#x589E;&#x52A0;&#x4E86;GPU&#x9876;&#x70B9;&#x7740;&#x8272;&#x5668;&#x7684;&#x6267;&#x884C;&#x6B21;&#x6570;(&#x6BCF;&#x4E2A;&#x9876;&#x70B9;&#x6267;&#x884C;&#x4E00;&#x6B21;)&#x3002;</p>
<p>OpenGL&#x63D0;&#x4F9B;&#x4E86;&#x65B0;&#x7684;&#x673A;&#x5236; - <code>&#x9876;&#x70B9;&#x7D22;&#x5F15;</code>&#xFF0C;&#x6765;&#x8FDB;&#x884C;&#x4F18;&#x5316;&#x3002;</p>
<h3 id="1-&#x4F55;&#x4E3A;&#x9876;&#x70B9;&#x7D22;&#x5F15;"><a name="1-&#x4F55;&#x4E3A;&#x9876;&#x70B9;&#x7D22;&#x5F15;" class="anchor-navigation-ex-anchor" href="#1-&#x4F55;&#x4E3A;&#x9876;&#x70B9;&#x7D22;&#x5F15;"><i class="fa fa-link" aria-hidden="true"></i></a>1. &#x4F55;&#x4E3A;&#x9876;&#x70B9;&#x7D22;&#x5F15;</h3>
<p>&#x4ECE;&#x5B9E;&#x4F8B;&#x4EE3;&#x7801;&#x4E2D;&#x4E5F;&#x53EF;&#x4EE5;&#x770B;&#x5230;&#xFF0C;&#x9876;&#x70B9;&#x5750;&#x6807;&#x6570;&#x636E;&#x4E00;&#x4E2A;&#x4E2A;&#x6570;&#x7EC4;&#xFF0C;&#x90A3;&#x4E48;&#x9876;&#x70B9;&#x7D22;&#x5F15;&#x5C31;&#x662F;&#x8FD9;&#x4E2A;&#x6570;&#x7EC4;&#x7684;index&#x3002;
&#x4EE5;&#x6B63;&#x65B9;&#x5F62;&#x7684;&#x9876;&#x70B9;&#x5750;&#x6807;&#x6570;&#x636E;&#x4E3A;&#x4F8B;&#xFF1A;</p>
<pre><code class="lang-c++"><span class="hljs-keyword">static</span> <span class="hljs-keyword">const</span> glm::vec3 Positions[<span class="hljs-number">6</span>] =
{
    <span class="hljs-comment">//&#x7B2C;&#x4E00;&#x4E2A;&#x4E09;&#x89D2;&#x5F62;</span>
    { <span class="hljs-number">-1.0</span>f, <span class="hljs-number">-1.0</span>f, <span class="hljs-number">0.0f</span>},<span class="hljs-comment">//&#x5DE6;&#x4E0B;</span>
    {  <span class="hljs-number">1.0f</span>, <span class="hljs-number">-1.0</span>f, <span class="hljs-number">0.0f</span>},<span class="hljs-comment">//&#x53F3;&#x4E0B;</span>
    {  <span class="hljs-number">1.0f</span>,  <span class="hljs-number">1.0f</span>, <span class="hljs-number">0.0f</span>},<span class="hljs-comment">//&#x53F3;&#x4E0A;</span>

    <span class="hljs-comment">//&#x7B2C;&#x4E8C;&#x4E2A;&#x4E09;&#x89D2;&#x5F62;</span>
    {  <span class="hljs-number">1.0f</span>,  <span class="hljs-number">1.0f</span>, <span class="hljs-number">0.0f</span>},<span class="hljs-comment">//&#x53F3;&#x4E0A;</span>
    { <span class="hljs-number">-1.0</span>f, <span class="hljs-number">-1.0</span>f, <span class="hljs-number">0.0f</span>},<span class="hljs-comment">//&#x5DE6;&#x4E0A;</span>
    { <span class="hljs-number">-1.0</span>f,  <span class="hljs-number">1.0f</span>, <span class="hljs-number">0.0f</span>}<span class="hljs-comment">//&#x5DE6;&#x4E0B;</span>
};
</code></pre>
<p>&#x53BB;&#x6389;&#x91CD;&#x590D;&#xFF0C;&#x5B9E;&#x9645;&#x4E0A;&#x53EA;&#x6709;4&#x4E2A;&#x9876;&#x70B9;&#xFF1A;</p>
<pre><code class="lang-c++"><span class="hljs-keyword">static</span> <span class="hljs-keyword">const</span> glm::vec3 Positions[<span class="hljs-number">4</span>] =
{
    { <span class="hljs-number">-1.0</span>f, <span class="hljs-number">-1.0</span>f, <span class="hljs-number">0.0f</span>},<span class="hljs-comment">//&#x5DE6;&#x4E0B;</span>
    {  <span class="hljs-number">1.0f</span>, <span class="hljs-number">-1.0</span>f, <span class="hljs-number">0.0f</span>},<span class="hljs-comment">//&#x53F3;&#x4E0B;</span>
    {  <span class="hljs-number">1.0f</span>,  <span class="hljs-number">1.0f</span>, <span class="hljs-number">0.0f</span>},<span class="hljs-comment">//&#x53F3;&#x4E0A;</span>
    { <span class="hljs-number">-1.0</span>f, <span class="hljs-number">-1.0</span>f, <span class="hljs-number">0.0f</span>},<span class="hljs-comment">//&#x5DE6;&#x4E0A;</span>
};
</code></pre>
<p>&#x8FD9;4&#x4E2A;&#x9876;&#x70B9;&#xFF0C;&#x8981;&#x600E;&#x4E48;&#x7EC4;&#x6210;2&#x4E2A;&#x4E09;&#x89D2;&#x5F62;&#x5462;&#xFF1F;
&#x53BB;&#x91CD;&#x540E;&#x9876;&#x70B9;&#x5750;&#x6807;&#x6570;&#x636E;&#x4E0D;&#x53EF;&#x4EE5;&#x91CD;&#x590D;&#xFF0C;&#x4F46;&#x662F;&#x53EF;&#x4EE5;&#x65B0;&#x5EFA;&#x4E00;&#x4E2A;&#x6570;&#x7EC4;&#xFF0C;&#x5B58;&#x50A8;&#x91CD;&#x590D;&#x7684;&#x9876;&#x70B9;&#x7D22;&#x5F15;&#x3002;</p>
<pre><code class="lang-c++"><span class="hljs-keyword">static</span> <span class="hljs-keyword">const</span> glm::vec3 indices[<span class="hljs-number">6</span>] =
{
    <span class="hljs-comment">//&#x7B2C;&#x4E00;&#x4E2A;&#x4E09;&#x89D2;&#x5F62;</span>
    <span class="hljs-number">0</span>,<span class="hljs-number">1</span>,<span class="hljs-number">2</span>,
    <span class="hljs-comment">//&#x7B2C;&#x4E8C;&#x4E2A;&#x4E09;&#x89D2;&#x5F62;</span>
    <span class="hljs-number">2</span>,<span class="hljs-number">3</span>,<span class="hljs-number">1</span>
};
</code></pre>
<p>&#x501F;&#x52A9;&#x9876;&#x70B9;&#x7D22;&#x5F15;&#x6570;&#x7EC4;&#xFF0C;&#x95F4;&#x63A5;&#x5730;&#x7EC4;&#x6210;&#x4E86;2&#x4E2A;&#x4E09;&#x89D2;&#x5F62;&#x3002;</p>
<h3 id="2-&#x4F55;&#x4E3A;&#x9876;&#x70B9;&#xFF1F;"><a name="2-&#x4F55;&#x4E3A;&#x9876;&#x70B9;&#xFF1F;" class="anchor-navigation-ex-anchor" href="#2-&#x4F55;&#x4E3A;&#x9876;&#x70B9;&#xFF1F;"><i class="fa fa-link" aria-hidden="true"></i></a>2. &#x4F55;&#x4E3A;&#x9876;&#x70B9;&#xFF1F;</h3>
<pre><code>&#x672C;&#x6BB5;&#x843D;CLion&#x9879;&#x76EE;&#x6587;&#x4EF6;&#x4F4D;&#x4E8E; samples\vertex_index_and_buffer\vertex
</code></pre><p>&#x4E0A;&#x9762;&#x8BF4;&#x4E86;&#xFF0C;&#x5C06;&#x9876;&#x70B9;&#x5750;&#x6807;&#x53BB;&#x91CD;&#xFF0C;&#x7136;&#x540E;&#x65B0;&#x5EFA;&#x6570;&#x7EC4;&#x5B58;&#x50A8;&#x4E0B;&#x6807;&#xFF0C;&#x90A3;&#x4E48;&#x9876;&#x70B9;&#x989C;&#x8272;&#x548C;UV&#x5750;&#x6807;&#x600E;&#x4E48;&#x5904;&#x7406;&#x5462;&#xFF1F;</p>
<p>&#x8FD9;&#x91CC;&#x6211;&#x4EEC;&#x8981;&#x660E;&#x786E;&#x4E00;&#x4E2A;&#x6982;&#x5FF5; -- <font color="blue">&#x9876;&#x70B9;&#x662F;&#x4EC0;&#x4E48;&#xFF1F;
&#x4E00;&#x4E2A;&#x9876;&#x70B9;&#xFF0C;&#x5305;&#x542B;&#x4E86;&#x9876;&#x70B9;&#x5750;&#x6807;&#x3001;&#x9876;&#x70B9;&#x989C;&#x8272;&#x3001;UV&#x5750;&#x6807;&#x8FD9;&#x4E09;&#x4E2A;&#x6570;&#x636E;&#x3002;</font></p>
<p>&#x4E09;&#x8005;&#x4EFB;&#x610F;&#x4E4B;&#x4E00;&#x4E0D;&#x540C;&#xFF0C;&#x90A3;&#x4E48;&#x5C31;&#x662F;2&#x4E2A;&#x4E0D;&#x540C;&#x7684;&#x9876;&#x70B9;&#x3002;
&#x6240;&#x4EE5;&#x4F7F;&#x7528;&#x9876;&#x70B9;&#x7D22;&#x5F15;&#x9700;&#x8981;&#x8FDB;&#x884C;&#x53BB;&#x91CD;&#xFF0C;&#x662F;&#x53BB;&#x6389;&#x4E09;&#x8005;&#x5B8C;&#x5168;&#x76F8;&#x540C;&#x7684;&#x9876;&#x70B9;&#x3002;</p>
<p>&#x4E3A;&#x4E86;&#x66F4;&#x6DF1;&#x5165;&#x7406;&#x89E3;&#x9876;&#x70B9;&#x6982;&#x5FF5;&#xFF0C;&#x5BF9;<code>vertex_data.h</code>&#x8FDB;&#x884C;&#x4FEE;&#x6539;&#xFF0C;&#x5F15;&#x5165;<code>struct  Vertex</code>&#xFF0C;&#x5E76;&#x5C06;&#x4E4B;&#x524D;&#x7684;&#x9876;&#x70B9;&#x5750;&#x6807;(kPositions)&#x3001;&#x9876;&#x70B9;&#x989C;&#x8272;(kColors)&#x3001;UV&#x5750;&#x6807;(kUvs)&#x8FD9;&#x4E09;&#x4E2A;&#x6570;&#x636E;&#x5408;&#x5E76;&#x4E3A;&#x9876;&#x70B9;(kVertexs)&#x3002;</p>
<pre><code class="lang-c++"><span class="hljs-comment">//&#x9876;&#x70B9;</span>
<span class="hljs-keyword">struct</span>  Vertex
{
    glm::vec3 pos_;
    glm::vec4 color_;
    glm::vec2 uv_;
};

<span class="hljs-keyword">static</span> <span class="hljs-keyword">const</span> Vertex kVertexs[<span class="hljs-number">36</span>] ={
    <span class="hljs-comment">//Front</span>
    glm::vec3(<span class="hljs-number">-1.0</span>f, <span class="hljs-number">-1.0</span>f, <span class="hljs-number">1.0f</span>), glm::vec4(<span class="hljs-number">1.0f</span>,<span class="hljs-number">1.0f</span>,<span class="hljs-number">1.0f</span>,<span class="hljs-number">1.0f</span>),   glm::vec2(<span class="hljs-number">0.0f</span>, <span class="hljs-number">0.0f</span>),
    glm::vec3( <span class="hljs-number">1.0f</span>, <span class="hljs-number">-1.0</span>f, <span class="hljs-number">1.0f</span>), glm::vec4(<span class="hljs-number">1.0f</span>,<span class="hljs-number">1.0f</span>,<span class="hljs-number">1.0f</span>,<span class="hljs-number">1.0f</span>),   glm::vec2(<span class="hljs-number">1.0f</span>, <span class="hljs-number">0.0f</span>),
    glm::vec3( <span class="hljs-number">1.0f</span>,  <span class="hljs-number">1.0f</span>, <span class="hljs-number">1.0f</span>), glm::vec4(<span class="hljs-number">1.0f</span>,<span class="hljs-number">1.0f</span>,<span class="hljs-number">1.0f</span>,<span class="hljs-number">1.0f</span>),   glm::vec2(<span class="hljs-number">1.0f</span>, <span class="hljs-number">1.0f</span>),

    glm::vec3(<span class="hljs-number">-1.0</span>f, <span class="hljs-number">-1.0</span>f, <span class="hljs-number">1.0f</span>), glm::vec4(<span class="hljs-number">1.0f</span>,<span class="hljs-number">1.0f</span>,<span class="hljs-number">1.0f</span>,<span class="hljs-number">1.0f</span>),   glm::vec2(<span class="hljs-number">0.0f</span>, <span class="hljs-number">0.0f</span>),
    glm::vec3( <span class="hljs-number">1.0f</span>,  <span class="hljs-number">1.0f</span>, <span class="hljs-number">1.0f</span>), glm::vec4(<span class="hljs-number">1.0f</span>,<span class="hljs-number">1.0f</span>,<span class="hljs-number">1.0f</span>,<span class="hljs-number">1.0f</span>),   glm::vec2(<span class="hljs-number">1.0f</span>, <span class="hljs-number">1.0f</span>),
    glm::vec3(<span class="hljs-number">-1.0</span>f,  <span class="hljs-number">1.0f</span>, <span class="hljs-number">1.0f</span>), glm::vec4(<span class="hljs-number">1.0f</span>,<span class="hljs-number">1.0f</span>,<span class="hljs-number">1.0f</span>,<span class="hljs-number">1.0f</span>),   glm::vec2(<span class="hljs-number">0.0f</span>, <span class="hljs-number">1.0f</span>),

    <span class="hljs-comment">//back</span>
    glm::vec3(<span class="hljs-number">-1.0</span>f, <span class="hljs-number">-1.0</span>f, <span class="hljs-number">-1.0</span>f), glm::vec4(<span class="hljs-number">1.0f</span>,<span class="hljs-number">1.0f</span>,<span class="hljs-number">1.0f</span>,<span class="hljs-number">1.0f</span>),   glm::vec2(<span class="hljs-number">0.0f</span>, <span class="hljs-number">0.0f</span>),
    ......
};
</code></pre>
<p>&#x7136;&#x540E;&#x5728;&#x5C06;&#x9876;&#x70B9;&#x6570;&#x636E;&#x4E0E;&#x9876;&#x70B9;Shader&#x5C5E;&#x6027;&#x8FDB;&#x884C;&#x5173;&#x8054;&#x65F6;&#xFF0C;&#x9700;&#x8981;&#x52A0;&#x4E0A;&#x6307;&#x9488;&#x504F;&#x79FB;&#xFF0C;&#x4EE3;&#x7801;&#x5982;&#x4E0B;&#xFF1A;</p>
<pre><code class="lang-c++"><span class="hljs-comment">//main.cpp</span>

<span class="hljs-comment">//&#x542F;&#x7528;&#x9876;&#x70B9;Shader&#x5C5E;&#x6027;(a_pos)&#xFF0C;&#x6307;&#x5B9A;&#x4E0E;&#x9876;&#x70B9;&#x5750;&#x6807;&#x6570;&#x636E;&#x8FDB;&#x884C;&#x5173;&#x8054;</span>
glEnableVertexAttribArray(vpos_location);
glVertexAttribPointer(vpos_location, <span class="hljs-number">3</span>, GL_FLOAT, <span class="hljs-literal">false</span>, <span class="hljs-keyword">sizeof</span>(Vertex), kVertexs);

<span class="hljs-comment">//&#x542F;&#x7528;&#x9876;&#x70B9;Shader&#x5C5E;&#x6027;(a_color)&#xFF0C;&#x6307;&#x5B9A;&#x4E0E;&#x9876;&#x70B9;&#x989C;&#x8272;&#x6570;&#x636E;&#x8FDB;&#x884C;&#x5173;&#x8054;</span>
glEnableVertexAttribArray(vcol_location);
glVertexAttribPointer(vcol_location, <span class="hljs-number">4</span>, GL_FLOAT, <span class="hljs-literal">false</span>, <span class="hljs-keyword">sizeof</span>(Vertex), ((<span class="hljs-keyword">float</span>*)kVertexs) + <span class="hljs-number">3</span>);

<span class="hljs-comment">//&#x542F;&#x7528;&#x9876;&#x70B9;Shader&#x5C5E;&#x6027;(a_uv)&#xFF0C;&#x6307;&#x5B9A;&#x4E0E;&#x9876;&#x70B9;UV&#x6570;&#x636E;&#x8FDB;&#x884C;&#x5173;&#x8054;</span>
glEnableVertexAttribArray(a_uv_location);
glVertexAttribPointer(a_uv_location, <span class="hljs-number">2</span>, GL_FLOAT, <span class="hljs-literal">false</span>, <span class="hljs-keyword">sizeof</span>(Vertex), ((<span class="hljs-keyword">float</span>*)kVertexs) + <span class="hljs-number">3</span> + <span class="hljs-number">4</span>);
</code></pre>
<p>&#x4EE3;&#x7801;&#x4FEE;&#x6539;&#x540E;&#xFF0C;&#x6A21;&#x7CCA;&#x6389;&#x4E86;&#x9876;&#x70B9;&#x5750;&#x6807;&#x3001;&#x9876;&#x70B9;&#x989C;&#x8272;&#x3001;UV&#x5750;&#x6807;&#x8FD9;&#x4E09;&#x4E2A;&#x6570;&#x636E;&#xFF0C;&#x9762;&#x5BF9;&#x7684;&#x5C31;&#x662F;&#x9876;&#x70B9;&#x8FD9;&#x4E2A;&#x6574;&#x4F53;&#x3002;</p>
<h3 id="3-&#x4F7F;&#x7528;&#x9876;&#x70B9;&#x7D22;&#x5F15;&#x7ED8;&#x5236;&#x7ACB;&#x65B9;&#x4F53;"><a name="3-&#x4F7F;&#x7528;&#x9876;&#x70B9;&#x7D22;&#x5F15;&#x7ED8;&#x5236;&#x7ACB;&#x65B9;&#x4F53;" class="anchor-navigation-ex-anchor" href="#3-&#x4F7F;&#x7528;&#x9876;&#x70B9;&#x7D22;&#x5F15;&#x7ED8;&#x5236;&#x7ACB;&#x65B9;&#x4F53;"><i class="fa fa-link" aria-hidden="true"></i></a>3. &#x4F7F;&#x7528;&#x9876;&#x70B9;&#x7D22;&#x5F15;&#x7ED8;&#x5236;&#x7ACB;&#x65B9;&#x4F53;</h3>
<p>&#x4E0B;&#x9762;&#x5C31;&#x5728;&#x4E0A;&#x4E00;&#x6BB5;&#x843D;&#x7684;&#x5B9E;&#x4F8B;&#x9879;&#x76EE;&#x57FA;&#x7840;&#x4E4B;&#x4E0A;&#xFF0C;&#x4F7F;&#x7528;&#x9876;&#x70B9;&#x7D22;&#x5F15;&#x7ED8;&#x5236;&#x7ACB;&#x65B9;&#x4F53;&#x3002;</p>
<pre><code>CLion&#x9879;&#x76EE;&#x6587;&#x4EF6;&#x4F4D;&#x4E8E; samples\vertex_index_and_buffer\indices
</code></pre><h4 id="31-&#x53BB;&#x9664;&#x91CD;&#x590D;&#x9876;&#x70B9;"><a name="31-&#x53BB;&#x9664;&#x91CD;&#x590D;&#x9876;&#x70B9;" class="anchor-navigation-ex-anchor" href="#31-&#x53BB;&#x9664;&#x91CD;&#x590D;&#x9876;&#x70B9;"><i class="fa fa-link" aria-hidden="true"></i></a>3.1 &#x53BB;&#x9664;&#x91CD;&#x590D;&#x9876;&#x70B9;</h4>
<p>&#x4E0A;&#x4E00;&#x6BB5;&#x843D;&#x7684;&#x5B9E;&#x4F8B;&#x9879;&#x76EE;&#xFF0C;&#x5B58;&#x6709;36&#x4E2A;&#x9876;&#x70B9;&#x5728;<code>kVertexs[36]</code>&#x4E2D;&#xFF0C;&#x9996;&#x5148;&#x7F16;&#x5199;&#x4EE3;&#x7801;&#x5C06;&#x9876;&#x70B9;&#x6570;&#x636E;&#x53BB;&#x91CD;&#xFF1A;</p>
<pre><code class="lang-c++"><span class="hljs-comment">//vertex_data.h</span>

<span class="hljs-comment">//&#x53BB;&#x91CD;&#x7684;&#x9876;&#x70B9;Vector</span>
<span class="hljs-keyword">static</span> <span class="hljs-built_in">vector</span>&lt;Vertex&gt; kVertexRemoveDumplicateVector;
<span class="hljs-comment">//&#x9876;&#x70B9;&#x7D22;&#x5F15;Vector</span>
<span class="hljs-keyword">static</span> <span class="hljs-built_in">vector</span>&lt;<span class="hljs-keyword">unsigned</span> <span class="hljs-keyword">short</span>&gt; kVertexIndexVector;

<span class="hljs-comment">//&#x9876;&#x70B9;&#x53BB;&#x91CD;</span>
<span class="hljs-function"><span class="hljs-keyword">static</span> <span class="hljs-keyword">void</span> <span class="hljs-title">VertexRemoveDumplicate</span><span class="hljs-params">()</span></span>{
    <span class="hljs-keyword">for</span> (<span class="hljs-keyword">int</span> i = <span class="hljs-number">0</span>; i &lt; <span class="hljs-number">36</span>; ++i) {
        <span class="hljs-keyword">const</span> Vertex&amp; vertex=kVertexs[i];
        <span class="hljs-comment">//&#x5224;&#x65AD;&#x9876;&#x70B9;&#x662F;&#x5426;&#x5B58;&#x5728;</span>
        ......
    }
}
</code></pre>
<p>&#x65AD;&#x70B9;&#x8C03;&#x8BD5;&#xFF0C;&#x53D1;&#x73B0;&#x9876;&#x70B9;&#x53BB;&#x91CD;&#x540E;&#x53EA;&#x5269;&#x4E0B;16&#x4E2A;&#xFF0C;&#x8282;&#x7701;&#x4E86;&#x4E00;&#x5927;&#x534A;&#x5185;&#x5B58;&#x3002;</p>
<p><a href="../../imgs/vbo_vertex_index/indices/remove_dumplicate_save_many_memory.jpg" data-lightbox="6e68ad31-4549-4986-8acb-4e03a4c77048" data-title=""><img src="../../imgs/vbo_vertex_index/indices/remove_dumplicate_save_many_memory.jpg" alt=""></a></p>
<p>&#x540E;&#x7EED;&#x6E32;&#x67D3;&#x5C31;&#x4F7F;&#x7528;&#x53BB;&#x91CD;&#x540E;&#x7684;&#x9876;&#x70B9;&#x6570;&#x636E;(kVertexRemoveDumplicateVector) &#x548C; &#x9876;&#x70B9;&#x7D22;&#x5F15;(kVertexIndexVector)&#x3002;</p>
<h4 id="32-&#x4F7F;&#x7528;&#x9876;&#x70B9;&#x7D22;&#x5F15;&#x7ED8;&#x5236;"><a name="32-&#x4F7F;&#x7528;&#x9876;&#x70B9;&#x7D22;&#x5F15;&#x7ED8;&#x5236;" class="anchor-navigation-ex-anchor" href="#32-&#x4F7F;&#x7528;&#x9876;&#x70B9;&#x7D22;&#x5F15;&#x7ED8;&#x5236;"><i class="fa fa-link" aria-hidden="true"></i></a>3.2 &#x4F7F;&#x7528;&#x9876;&#x70B9;&#x7D22;&#x5F15;&#x7ED8;&#x5236;</h4>
<p>&#x9996;&#x5148;&#x5C06;&#x53BB;&#x91CD;&#x540E;&#x7684;&#x9876;&#x70B9;&#x6570;&#x636E;(kVertexRemoveDumplicateVector)&#x4E0E;Shader&#x5C5E;&#x6027;&#x8FDB;&#x884C;&#x7ED1;&#x5B9A;:</p>
<pre><code class="lang-c++"><span class="hljs-comment">//&#x542F;&#x7528;&#x9876;&#x70B9;Shader&#x5C5E;&#x6027;(a_pos)&#xFF0C;&#x6307;&#x5B9A;&#x4E0E;&#x9876;&#x70B9;&#x5750;&#x6807;&#x6570;&#x636E;&#x8FDB;&#x884C;&#x5173;&#x8054;</span>
glVertexAttribPointer(vpos_location, <span class="hljs-number">3</span>, GL_FLOAT, <span class="hljs-literal">false</span>, <span class="hljs-keyword">sizeof</span>(Vertex), (<span class="hljs-keyword">float</span>*)(&amp;kVertexRemoveDumplicateVector[<span class="hljs-number">0</span>]));
<span class="hljs-comment">//&#x542F;&#x7528;&#x9876;&#x70B9;Shader&#x5C5E;&#x6027;(a_color)&#xFF0C;&#x6307;&#x5B9A;&#x4E0E;&#x9876;&#x70B9;&#x989C;&#x8272;&#x6570;&#x636E;&#x8FDB;&#x884C;&#x5173;&#x8054;</span>
glVertexAttribPointer(vcol_location, <span class="hljs-number">4</span>, GL_FLOAT, <span class="hljs-literal">false</span>, <span class="hljs-keyword">sizeof</span>(Vertex), ((<span class="hljs-keyword">float</span>*)(&amp;kVertexRemoveDumplicateVector[<span class="hljs-number">0</span>]) + <span class="hljs-number">3</span>));
<span class="hljs-comment">//&#x9876;&#x542F;&#x7528;&#x9876;&#x70B9;Shader&#x5C5E;&#x6027;(a_uv)&#xFF0C;&#x6307;&#x5B9A;&#x4E0E;&#x70B9;UV&#x6570;&#x636E;&#x8FDB;&#x884C;&#x5173;&#x8054;</span>
glVertexAttribPointer(a_uv_location, <span class="hljs-number">2</span>, GL_FLOAT, <span class="hljs-literal">false</span>, <span class="hljs-keyword">sizeof</span>(Vertex), ((<span class="hljs-keyword">float</span>*)(&amp;kVertexRemoveDumplicateVector[<span class="hljs-number">0</span>]) + <span class="hljs-number">3</span> + <span class="hljs-number">4</span>));
</code></pre>
<p>&#x7136;&#x540E;&#x4F7F;&#x7528;&#x9876;&#x70B9;&#x7D22;&#x5F15;(kVertexIndexVector)&#x8FDB;&#x884C;&#x7ED8;&#x5236;&#xFF0C;&#x9700;&#x8981;&#x5F15;&#x5165;&#x65B0;&#x7684;API - <code>glDrawElements</code>&#x3002;</p>
<pre><code>void glDrawElements(GLenum mode,GLsizei count,GLenum type,const void * indices);

&#x53C2;&#x6570;&#x89E3;&#x6790;&#xFF1A;
mode    &#x51E0;&#x4F55;&#x56FE;&#x5143;&#x7C7B;&#x578B;&#xFF0C;&#x53EF;&#x9009; GL_POINT(&#x70B9;)&#x3001;GL_LINE(&#x7EBF;)&#x3001;GL_TRIANGLES(&#x4E09;&#x89D2;&#x5F62;)
count   &#x51E0;&#x4F55;&#x56FE;&#x5143;&#x6570;&#x91CF;
type    &#x7D22;&#x5F15;&#x6570;&#x636E;&#x7C7B;&#x578B;
indices &#x7D22;&#x5F15;&#x6570;&#x7EC4;
</code></pre><p>&#x5C06;&#x539F;&#x6765;&#x7684;&#x4EE3;&#x7801;&#x4FEE;&#x6539;&#x4E3A;&#xFF1A;</p>
<pre><code class="lang-c++"><span class="hljs-comment">//glDrawArrays(GL_TRIANGLES, 0, 6*6);//&#x8868;&#x793A;&#x4ECE;&#x7B2C;0&#x4E2A;&#x9876;&#x70B9;&#x5F00;&#x59CB;&#x753B;&#xFF0C;&#x603B;&#x5171;&#x753B;6&#x4E2A;&#x9762;&#xFF0C;&#x6BCF;&#x4E2A;&#x9762;6&#x4E2A;&#x9876;&#x70B9;&#x3002;</span>
glDrawElements(GL_TRIANGLES,<span class="hljs-number">36</span>,GL_UNSIGNED_SHORT,(<span class="hljs-keyword">float</span>*)(&amp;kVertexIndexVector[<span class="hljs-number">0</span>]));<span class="hljs-comment">//&#x4F7F;&#x7528;&#x9876;&#x70B9;&#x7D22;&#x5F15;&#x8FDB;&#x884C;&#x7ED8;&#x5236;&#x3002;</span>
</code></pre>
<p>&#x518D;&#x6B21;&#x7F16;&#x8BD1;&#x8FD0;&#x884C;&#xFF0C;&#x7ED3;&#x679C;&#x6B63;&#x5E38;&#xFF1A;</p>
<p><a href="../../imgs/vbo_vertex_index/indices/draw_element_ok.jpg" data-lightbox="903dea79-50e4-44d6-bf01-b426548453be" data-title=""><img src="../../imgs/vbo_vertex_index/indices/draw_element_ok.jpg" alt=""></a> </p>
<footer class="page-footer"><span class="copyright">Copyright &#xA9; captainchen all right reserved&#xFF0C;powered by Gitbook</span><span class="footer-modification">File Modify: 
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